Head strap



FIG. 1 is a top perspective view of the head strap showing our new design within a broken line environment of use of a headset wherein the entire headset forms no part of the claimed design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a back elevation view thereof.

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a right side elevation view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings showing an environment of use of a headset are included for the purpose of illustrating environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a head strap, as shown and described. 